A flexible bag transport system for transporting flexible filling and sealing station which includes a pair of holding clamp assemblies opposed to each other for holding the top end of a bag. The first clamp assembly is supported by a first elongated carrier and a second clamp assembly is supported by a second elongated carrier that is parallel to the first carrier. Clamping assemblies remain apart from each other and the bags are transported and are displaced toward each other to permit the bag to be opened during filling of the bag. One of the elongated carriers supporting the clamping assemblies has an adjustable mechanism so that the clamp assemblies can be adjusted with respect to each other without requiring adjustment of the remaining components of the transport system.